The purpose, protocol, intent of the dive and whether or not there is anything "worthwhile" to see is nobody's business except the diver who put those bottles there.
I disagree. New divers read these forums and use them to learn. If a new diver reads this practice and thinks it's okay to do, he/she might go out and dive on a wreck and drop the deco cylinders on the line rather than carrying it throughout the dive. This is not appropriate and should not be encouraged.